https://doi.org/10.1140/epja/i2018-12508-4
Regular Article - Experimental Physics
The reliability of photoneutron cross sections for 90,91,92,94Zr
1
Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, 119991, Moscow, Russia
2
Physics Faculty, Lomonosov Moscow State University, 119991, Moscow, Russia
* e-mail: vvvarlamov@gmail.com
Received:
30
January
2018
Accepted:
8
April
2018
Published online:
14
May
2018
Data on partial photoneutron reaction cross sections 
and 
for 90,91,92,94Zr obtained at Livermore (USA) and for 90Zr obtained at Saclay (France) were analyzed. Experimental data were obtained using quasimonoenergetic photon beams from the annihilation in flight of relativistic positrons. The method of photoneutron multiplicity sorting based on the neutron energy measuring was used to separate partial reactions. The research carried out is based on the objective of using the physical criteria of data reliability. The large systematic uncertainties were found in partial cross sections, since they do not satisfy those criteria. To obtain the reliable cross sections of the partial and and total + reactions on 90,91,92,94Zr and 
reaction on 94Zr, the experimental-theoretical method was used. It is based on the experimental data for neutron yield cross section rather independent from the neutron multiplicity and theoretical equations of the combined photonucleon reaction model (CPNRM). Newly evaluated data are compared with experimental ones. The reasons of noticeable disagreements between those are discussed.
© SIF, Springer-Verlag GmbH Germany, part of Springer Nature, 2018
